/*
 * Copyright (C) 2013 Leszek Mzyk
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.adeaz.sdk.demo.wow;

import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;

/**
 * A PagerAdapter wrapper responsible for providing a proper page to
 * LoopViewPager
 * <p>
 * This class shouldn't be used directly
 */
public class LoopPagerAdapter extends PagerAdapter {

    private PagerAdapter mAdapter;


    LoopPagerAdapter(PagerAdapter adapter) {
        this.mAdapter = adapter;
    }

    @Override
    public void notifyDataSetChanged() {
        super.notifyDataSetChanged();
    }

    int toRealPosition(int position) {
        int realPosition = position % getRealCount();
        return realPosition;
    }

    public int toInnerPosition(int realPosition) {
        return realPosition;
    }


    @Override
    public int getCount() {
        return Integer.MAX_VALUE;
    }

    public int getRealCount() {
        return mAdapter.getCount();
    }

    public PagerAdapter getRealAdapter() {
        return mAdapter;
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        int realPosition = toRealPosition(position);
        return mAdapter.instantiateItem(container, realPosition);
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        int realPosition = toRealPosition(position);
        mAdapter.destroyItem(container, realPosition, object);
    }

	/*
     * Delegate rest of methods directly to the inner adapter.
	 */

    @Override
    public void finishUpdate(ViewGroup container) {
        mAdapter.finishUpdate(container);
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return mAdapter.isViewFromObject(view, object);
    }

    @Override
    public void restoreState(Parcelable bundle, ClassLoader classLoader) {
        mAdapter.restoreState(bundle, classLoader);
    }

    @Override
    public Parcelable saveState() {
        return mAdapter.saveState();
    }

    @Override
    public void startUpdate(ViewGroup container) {
        mAdapter.startUpdate(container);
    }

    @Override
    public void setPrimaryItem(ViewGroup container, int position, Object object) {
        mAdapter.setPrimaryItem(container, position, object);
    }
}